package com.antler.smt.utils;

import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Map对象转换工具
 *
 * @author vic
 * @date 2017-09-25 15:12
 */
public class MapUtil {
    /**
     * 从map集合中获取属性值
     *
     * @param <E>
     * @param map          map集合
     * @param key          键对
     * @param defaultValue 默认值
     * @return
     */
    public final static <E> E get(Map map, Object key, E defaultValue) {
        Object o = map.get(key);
        if (o == null) {
            return defaultValue;
        }
        return (E) o;
    }

    /**
     * Map集合对象转化成 JavaBean集合对象
     *
     * @param javaBean JavaBean实例对象
     * @param mapList  Map数据集对象
     * @return
     */
    public static <T> List<T> map2Java(T javaBean, List<Map> mapList) {
        if (mapList == null || mapList.isEmpty()) {
            return null;
        }
        List<T> objectList = new ArrayList<T>();

        T object = null;
        for (Map map : mapList) {
            if (map != null) {
                object = map2Java(javaBean, map);
                objectList.add(object);
            }
        }

        return objectList;

    }

    /**
     * Map对象转化成 JavaBean对象
     *
     * @param javaBean JavaBean实例对象
     * @param map      Map对象
     * @return
     */
    public static <T> T map2Java(T javaBean, Map map) {
        try {
            // 获取javaBean属性
            BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass());
            // 创建 JavaBean 对象
            Object obj = javaBean.getClass().newInstance();
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            if (propertyDescriptors != null && propertyDescriptors.length > 0) {
                String propertyName = null;
                Object propertyValue = null;
                for (PropertyDescriptor pd : propertyDescriptors) {
                    propertyName = pd.getName();
                    if (map.containsKey(propertyName)) {
                        propertyValue = map.get(propertyName);
                        pd.getWriteMethod().invoke(obj, new Object[]{propertyValue});
                    }
                }
                return (T) obj;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * JavaBean对象转化成Map对象
     *
     * @param javaBean
     * @return
     */
    public static Map java2Map(Object javaBean) {
        Map map = new HashMap(16);
        try {
            // 获取javaBean属性
            BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            if (propertyDescriptors != null && propertyDescriptors.length > 0) {
                String propertyName = null;
                Object propertyValue = null;
                for (PropertyDescriptor pd : propertyDescriptors) {
                    propertyName = pd.getName();
                    if (!"class".equals(propertyName)) {
                        Method readMethod = pd.getReadMethod();
                        propertyValue = readMethod.invoke(javaBean, new Object[0]);
                        map.put(propertyName, propertyValue);
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return map;
    }

    /**
     * JavaBean对象转化成MultiValueMap对象
     *
     * @param javaBean
     * @return
     */
    public static MultiValueMap<String, String> javabean2MultiValueMap(Object javaBean) {
        MultiValueMap<String, String> multiValueMap = new LinkedMultiValueMap();
        try {
            // 获取javaBean属性
            BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            if (propertyDescriptors != null && propertyDescriptors.length > 0) {
                for (PropertyDescriptor pd : propertyDescriptors) {
                    String propertyName = pd.getName();
                    if (!"class".equals(propertyName)) {
                        Method readMethod = pd.getReadMethod();
                        Object propertyValue = readMethod.invoke(javaBean, new Object[0]);
                        multiValueMap.add(propertyName, propertyValue.toString());
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return multiValueMap;
    }
}

